arch/arm64/Makefile

   1 #
   2 # arch/arm64/Makefile
   3 #
   4 # This file is included by the global makefile so that you can add your own
   5 # architecture-specific flags and dependencies.
   6 #
   7 # This file is subject to the terms and conditions of the GNU General Public
   8 # License.  See the file "COPYING" in the main directory of this archive
   9 # for more details.
  10 #
  11 # Copyright (C) 1995-2001 by Russell King
  12
  13 LDFLAGS_vmlinux :=-p --no-undefined -X
  14 CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
  15 OBJCOPYFLAGS    :=-O binary -R .note -R .note.gnu.build-id -R .comment -S
  16 GZFLAGS         :=-9
  17
  18 KBUILD_DEFCONFIG := defconfig
  19
  20 # Check for binutils support for specific extensions
  21 lseinstr := $(call as-instr,.arch_extension lse,-DCONFIG_AS_LSE=1)
  22
  23 ifeq ($(CONFIG_ARM64_LSE_ATOMICS), y)
  24   ifeq ($(lseinstr),)
  25 $(warning LSE atomics not supported by binutils)
  26   endif
  27 endif
  28
  29 KBUILD_CFLAGS   += -mgeneral-regs-only $(lseinstr)
  30 KBUILD_CFLAGS   += -fno-asynchronous-unwind-tables
  31 KBUILD_CFLAGS   += $(call cc-option, -mpc-relative-literal-loads)
  32 KBUILD_AFLAGS   += $(lseinstr)
  33
  34 ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
  35 KBUILD_CPPFLAGS += -mbig-endian
  36 AS              += -EB
  37 LD              += -EB
  38 else
  39 KBUILD_CPPFLAGS += -mlittle-endian
  40 AS              += -EL
  41 LD              += -EL
  42 endif
  43
  44 CHECKFLAGS      += -D__aarch64__
  45
  46 ifeq ($(CONFIG_ARM64_MODULE_CMODEL_LARGE), y)
  47 KBUILD_CFLAGS_MODULE    += -mcmodel=large
  48 endif
  49
  50 ifeq ($(CONFIG_ARM64_MODULE_PLTS),y)
  51 KBUILD_LDFLAGS_MODULE   += -T $(srctree)/arch/arm64/kernel/module.lds
  52 endif
  53
  54 # Default value
  55 head-y          := arch/arm64/kernel/head.o
  56
  57 # The byte offset of the kernel image in RAM from the start of RAM.
  58 ifeq ($(CONFIG_ARM64_RANDOMIZE_TEXT_OFFSET), y)
  59 TEXT_OFFSET := $(shell awk 'BEGIN {srand(); printf "0x%03x000\n", int(512 * rand())}')
  60 else
  61 TEXT_OFFSET := 0x00080000
  62 endif
  63
  64 # KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61)
  65 # in 32-bit arithmetic
  66 KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \
  67                         (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \
  68                         + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \
  69                         - (1 << (64 - 32 - 3)) )) )
  70
  71 export  TEXT_OFFSET GZFLAGS
  72
  73 core-y          += arch/arm64/kernel/ arch/arm64/mm/
  74 core-$(CONFIG_NET) += arch/arm64/net/
  75 core-$(CONFIG_KVM) += arch/arm64/kvm/
  76 core-$(CONFIG_XEN) += arch/arm64/xen/
  77 core-$(CONFIG_CRYPTO) += arch/arm64/crypto/
  78 libs-y          := arch/arm64/lib/ $(libs-y)
  79 core-$(CONFIG_EFI_STUB) += $(objtree)/drivers/firmware/efi/libstub/lib.a
  80
  81 # Default target when executing plain make
  82 KBUILD_IMAGE    := Image.gz
  83 KBUILD_DTBS     := dtbs
  84
  85 all:    $(KBUILD_IMAGE) $(KBUILD_DTBS)
  86
  87 boot := arch/arm64/boot
  88
  89 Image: vmlinux
  90         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
  91
  92 Image.%: vmlinux
  93         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
  94
  95 zinstall install: vmlinux
  96         $(Q)$(MAKE) $(build)=$(boot) $@
  97
  98 %.dtb: scripts
  99         $(Q)$(MAKE) $(build)=$(boot)/dts $(boot)/dts/$@
 100
 101 PHONY += dtbs dtbs_install
 102
 103 dtbs: prepare scripts
 104         $(Q)$(MAKE) $(build)=$(boot)/dts
 105
 106 dtbs_install:
 107         $(Q)$(MAKE) $(dtbinst)=$(boot)/dts
 108
 109 PHONY += vdso_install
 110 vdso_install:
 111         $(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
 112
 113 # We use MRPROPER_FILES and CLEAN_FILES now
 114 archclean:
 115         $(Q)$(MAKE) $(clean)=$(boot)
 116         $(Q)$(MAKE) $(clean)=$(boot)/dts
 117
 118 define archhelp
 119   echo  '* Image.gz      - Compressed kernel image (arch/$(ARCH)/boot/Image.gz)'
 120   echo  '  Image         - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
 121   echo  '* dtbs          - Build device tree blobs for enabled boards'
 122   echo  '  dtbs_install  - Install dtbs to $(INSTALL_DTBS_PATH)'
 123   echo  '  install       - Install uncompressed kernel'
 124   echo  '  zinstall      - Install compressed kernel'
 125   echo  '                  Install using (your) ~/bin/installkernel or'
 126   echo  '                  (distribution) /sbin/installkernel or'
 127   echo  '                  install to $$(INSTALL_PATH) and run lilo'
 128 endef